How to install HD-Trailers.net?
HD-Trailers.net is available in the official Kodi repository which is included by default in Kodi. You can install this addon by going in Kodi to System >> Settings >> Addons >> Get Addons >> XBMC.org Addons or Kodi.tv Addons
About SuperRepo and HD-Trailers.net
SuperRepo does not maintain HD-Trailers.net. We only provide an automated index for Kodi users to have easy access to HD-Trailers.net and other addons for Kodi. We are not affiliated with the developers (Tristan Fischer (sphere[AT]dersphere.de)) and do not provide help for this particular addon.